User Guide

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LMU-3x40 Training Guide
Revision & Date
1.6 – 03/24/2021
If the character ‘D’ is present, it indicates the LMU had a data session established when it responded to
the status request. For the 8-Bit product line an upper case ‘D’ indicates both the Inbound and
Maintenance sockets are ready. The lower case ‘d’ indicates that only the Maintenance socket is ready. A
‘.’ indicates no sockets are ready.
o [./a/A]:
This field indicates if the LMU has received an Acknowledgement from the Inbound server. This field will
be empty if the LMU has never received an ACK. The lower case ‘a’ will be present if it has received an
ACK since the last cold boot (i.e. power cycle) but not the last warm boot (App Restart or Sleep). The
upper case ‘A’ will be present if the LMU has received an ACK since the last warm boot. A ‘.’ Indicates no
acknowledgement has been received.
o [./L]:
This field indicates if the LMU’s log is currently active. An ‘L’ indicates that the log is currently in use (i.e.
one or more records have been stored) where a ‘.’ indicates the log is inactive.
o [IP Address]:
This is an optional field if and is only present if the LMU has established a valid data session. This field will
contain the current IP address of the LMU as assigned by the wireless network. Note that if you see a
value of 192.168.0.0, this is an indication that the LMU has not been able to establish a data session.
o [<APN>]
The current Access Point Name in use by a GSM LMU.

GPS:
o [Antenna <Short/Open/Off>]:
This field, if present, indicates a problem with the LMU’s GPS antenna. A value of Short indicates that the
antenna cable has likely been crushed. A value of Open indicates that the antenna cable is either cut or
disconnected. A value of Off indicates that the LMU’ GPS receiver is off.
o [No Time Sync]:
If this field is present, it indicates that the LMU’s GPS receiver has not been able to find even a single GPS
satellite. This would likely been seen in conjunction with the above antenna error, or if the LMU GPS
antenna is otherwise blocked.
o [<FixStatus> <Sat Count>]:
If these fields are present it indicates that the LMU has, or had a valid GPS solution. The <Sat Count> field
indicates how many GPS satellites are currently in use by the LMU. The <FixStatus> field indicates the
type of fix. The Fix Status types are detailed in the LM Direct Reference Guide.